*{
    margin:0;
    padding:0
}
html,body{
    height: 100%;
}
body{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-color: #f7f7f7;
}
main{
    flex: 1px;
    overflow-y: scroll;
}
/* 页尾 */
footer{
    display: flex;
    justify-content: space-around;
    text-align: center;
    background-color: #fff;
}
footer>a{
    display: block;
}
footer .iconfont{
    font-size: 14px;
    color: #8b8b8b;
}
footer>a>p{
    font-size: 12px;
    color: #8b8b8b;
    line-height: 30px;
}
footer>a .active{
    color: #e43130;
}